Add an alternative method for keyboard discovery to speed up build (#6073)

* Add an alternative method for keyboard discovery to speed up build

* Chain MAKEFLAGS for docker_build.sh

* Slight improvement to number of items sent to sort

* Remove debug line

* Fix line escape

1 files changed, 8 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index a6c3ee35b..6512f7217 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,10 @@ endif
 override SILENT := false
 
 ifndef SUB_IS_SILENT
-QMK_VERSION := $(shell git describe --abbrev=0 --tags 2>/dev/null)
+ifndef SKIP_GIT
+    QMK_VERSION := $(shell git describe --abbrev=0 --tags 2>/dev/null)
+endif
+
 ifneq ($(QMK_VERSION),)
 $(info QMK Firmware $(QMK_VERSION))
 endif
@@ -94,6 +97,7 @@ $(eval $(call NEXT_PATH_ELEMENT))
 # endif
 
 define GET_KEYBOARDS
+ifndef ALT_GET_KEYBOARDS
     All_RULES_MK := $$(patsubst $(ROOT_DIR)/keyboards/%/rules.mk,%,$$(wildcard $(ROOT_DIR)/keyboards/*/rules.mk))
     All_RULES_MK += $$(patsubst $(ROOT_DIR)/keyboards/%/rules.mk,%,$$(wildcard $(ROOT_DIR)/keyboards/*/*/rules.mk))
     All_RULES_MK += $$(patsubst $(ROOT_DIR)/keyboards/%/rules.mk,%,$$(wildcard $(ROOT_DIR)/keyboards/*/*/*/rules.mk))
@@ -105,6 +109,9 @@ define GET_KEYBOARDS
     KEYMAPS_MK += $$(patsubst $(ROOT_DIR)/keyboards/%/rules.mk,%,$$(wildcard $(ROOT_DIR)/keyboards/*/*/*/*/keymaps/*/rules.mk))
 
     KEYBOARDS := $$(sort $$(filter-out $$(KEYMAPS_MK), $$(All_RULES_MK)))
+else
+    KEYBOARDS := $(shell find keyboards/ -type f -iname "rules.mk" | grep -v keymaps | sed 's!keyboards/\(.*\)/rules.mk!\1!' | sort | uniq)
+endif
 endef
 
 $(eval $(call GET_KEYBOARDS))